interface Calendar {
    link?: string;
}
/**
 * Open Calendar app.
 *
 * @param payload - Optional webcal subscription link.
 * @returns Calendar open URL.
 * @example
 * calendar()
 * // => 'ical://'
 * @example
 * calendar({ link: 'https://p10-calendars.icloud.com/holiday/CN_zh.ics' })
 * // => 'webcal://p10-calendars.icloud.com/holiday/CN_zh.ics'
 */
export declare function calendar(payload?: Calendar): string;
export {};